55823013 has 20 divisors (see below), whose sum is σ = 84212128. Its totient is φ = 36848520.

The previous prime is 55822967. The next prime is 55823021. The reversal of 55823013 is 31032855.

It is not a de Polignac number, because 55823013 - 2⁸ = 55822757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55823063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4998 + ... + 11688.

Almost surely, 2^55823013 is an apocalyptic number.

It is an amenable number.

55823013 is a deficient number, since it is larger than the sum of its proper divisors (28389115).

55823013 is a wasteful number, since it uses less digits than its factorization.

55823013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806 (or 6797 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 55823013 is about 7471.4799738740. The cubic root of 55823013 is about 382.1827588712.

Adding to 55823013 its reverse (31032855), we get a palindrome (86855868).

The spelling of 55823013 in words is "fifty-five million, eight hundred twenty-three thousand, thirteen".